Diablo Auger Bit DAG3160 1 1 2 Inch x 17 1 2 Inch (Self Feeding Dura Tip Dual Edge 7 16 Hex Shank Wood Nail Embedded Timber Drilling) Circular Saw Blades easily concealable nail head easily concealable nail head Industrial Wrap Around Tubular Cradle: Heavy wall 1 1 4 inch welded steel perimeter frame finished in industrial powder coat paint protects generator components against severe jobsite impacts Self Feeding Dura Tip™ Screw Head: Aggressive threaded lead screw pulls the bit smoothly through wood substrates with minimal operator push effort 13 1 2 Inch Deep Core Working Reach: Deep flute working depth enables single pass penetrations through thick timber assemblies and multi ply studs